CN109024554A - Construction method of double-high-pressure mixing-spraying pile waterproof curtain - Google Patents
Construction method of double-high-pressure mixing-spraying pile waterproof curtain Download PDFInfo
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- CN109024554A CN109024554A CN201810617872.0A CN201810617872A CN109024554A CN 109024554 A CN109024554 A CN 109024554A CN 201810617872 A CN201810617872 A CN 201810617872A CN 109024554 A CN109024554 A CN 109024554A
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- pile
- stake
- pressure
- drill bit
- double
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000005507 spraying Methods 0.000 title claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000011065 in-situ storage Methods 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims description 19
- 239000011440 grout Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000008400 supply water Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a construction method of a double high-pressure mixing-spraying pile waterproof curtain, which comprises the following steps: step one, measuring and lofting; step two: the long spiral pile machine is positioned by adopting a drill bit with a special structure; step three: preparing cement paste; step four: the drill bit rotates clockwise at a constant rotating speed and sprays high-pressure cement slurry at the same time, so that the soil body is stirred in situ; with the rotation of the long screw pile driver, the high-pressure grouting machine and the air compressor continuously supply water slurry and air; step five: when the long screw pile driver drills to a preset position, stopping the operation of the drilling machine, and spraying high-pressure cement paste while rotating in the anticlockwise direction while lifting a drill bit; and lifting the drill bit away from the ground to finish the construction of the double high-pressure stirring and spraying pile. The construction method of the double-high-pressure mixing-spraying pile fundamentally solves the problem that the rotary spraying pile cannot be constructed in the residual hard soil layer and the residual weathered stratum, and the vertical waterproof curtain is formed by mutual engagement of the piles, so that the construction method has great application value in the aspects of seepage prevention and water stopping of the foundation pit of the excavated station and foundation reinforcement.
Description
Technical field
The invention belongs to the construction methods of foundation pit sealing, and in particular to a kind of construction party of double high-pressure stirring-spraying pile water-stop curtains
Method.
Background technique
With the development of urban track traffic, the excavation of subway station faces foundation ditch strengthening and sealing problem.It is existing to stir
It is complicated to topography and extremely limited and right containing applications such as hard stratum, boulder bed, miscellaneous fills except jackstone, basement rock to mix stake
Stratum it is poor for applicability；On the one hand the pile quality of stake is unable to get guarantee after mixing pile construction, and another aspect stake is stirred not
Uniformly.A kind of construction method for remaining hard stratum, residual weathered stratum foundation pit sealing is needed at present.
Summary of the invention
The present invention makes double high-pressure stirring-spraying piles be suitable for processing by improving drill bit and construction method in order to solve problem above
Mud, muck soil, cohesive soil, clay, sandy soil, artificial earth fill are especially the strengthening of foundation for remaining hard stratum, residual weathered stratum
And water-stop curtain construction problem, fundamentally improve the pile radius of pile body and the uniformity of stake.
The present invention uses following technical scheme in order to solve the above problem:
A kind of construction method of double high-pressure stirring-spraying pile water-stop curtains, construction procedure are as follows:
Step 1: the center spacing control of surveying and locating, stake and stake is in 0.3-0.5d (diameter that d is stake) range；
Step 2: long spire stake machine moves to pile driving position and is adjusted pile body, fixed pile；Long spire stake machine is using following
The drill bit of structure: a pair of rectangular blade and a pair of rectangular lower blade being arranged including bit matrix, on bit matrix,
The length of blade is greater than the length of lower blade, and blade and inferior lobe on piece are respectively provided with the antisymmetric tooth head in left and right；Bit matrix
End setting bore tooth, the inside of bit matrix is arranged double high pressure water slurry channels, the bottom setting of blade and lower blade with
The nozzle of double high pressure water slurry channel perforations；
Step 3: preparing cement slurry, uses when for high-pressure injection pump mud jacking；
Step 4: double high pressure cements in the output end of high-pressure grout injector and the output end and bit matrix of air compressor
Starch channel connection；Start long spire stake machine, high-pressure grout injector and air compressor, the cement slurry and air of high-pressure grout injector compression
The air of compressor compresses forms high pressure water mud in drill bit, and drill bit is rotated in the forward direction with constant rotational speed, sprays height in rotation
Compressed water slurry makes the soil body be agitated in situ；
Step 5: when long spire stake machine drill to predetermined position, stopping drilling machine operation, reversed to revolve while drill bit is lifted
Turn, sprays high pressure water mud in rotation；The construction of double high-pressure stirring-spraying piles is completed on drill bit lift-off ground；
Step 6: drilling machine displacement repeats step 2 to step 5, completes all piles position into next pile stake position
Construction.
The construction method of double high-pressure stirring-spraying piles, using long spire stake machine, with high-pressure injection pump by cement slurry through drill pipe bore
It is delivered to nozzle special on drill bit, while compressed air is delivered to the nozzle on drill bit through drilling rod exit orifice and penetrates together with cement slurry
Out；In drilling rod rotary course, blade on drill bit by soil carry out action of forced stirring, cement slurry and compressed air with bit to
The injection of the surrounding soil body, forms the mixture of soil and cement slurry, and consolidation pile body is formed after hardening；This method be suitable for except jackstone,
The location strengthening of foundation of the rich groundwaters such as various complex terrain hard stratums, boulder bed, miscellaneous fill except basement rock and sealing curtain
Curtain construction.
The present invention by using the double high-pressure stirring-spraying pile drill bits guarantee construction stake diameters of special designing and carries out action of forced stirring to soil,
High pressure water mud is projected from nozzle, forms the above high-pressure jet punching failure soil body of second level, realizes that slurries are delivered at a distance,
Under blade action of forced stirring and high-pressure jet collective effect, pile body cement grout is made to stir evenly to form a cylindrical consolidation
Body, i.e., double high-pressure stirring-spraying piles；It is mutually twisted and is coagulated together between double high-pressure stirring-spraying piles, there is certain intensity and impermeability,
It is configured to the water-stop curtain of antiseepage.
The blade of double high-pressure stirring-spraying pile drill bits is designed using bilateral symmetry, and blade is rectangle；When in view of bit
Blade is to the stirring capacity of soil, and blade arrangement is up big and down small mode, and the length of blade design is different available different straight
The stake of diameter；Tooth head is welded on blade, and in order to guarantee that double high-pressure stirring-spraying piles preferably cut soil, tooth head uses the antisymmetric side in left and right
Formula design；Nozzle design is in the bottom surface of blade, cement slurry destruction soil body from projecting in nozzle while bit stirs
Effect.
Double high-pressure stirring-spraying pile construction methods of the invention fundamentally solve rotary churning pile and are remaining hard stratum, residual weathering
Stratum can not construction problem, vertical water-stop curtain is formed by being mutually twisted for stake, excavate station pit it is anti-blend sealing and
There is biggish application value in terms of foundation stabilization.
Detailed description of the invention
Fig. 1 is the flow chart of the double high-pressure stirring-spraying pile waterproof curtain construction methods of the present invention；
Fig. 2 is the plan view of mixing pile of the present invention；
Fig. 3 is the structural schematic diagram of drill bit of the present invention；
Wherein: 1, bit matrix；2, blade；3, lower blade；4 and 5 be tooth head；6, tooth is bored；7, double high pressure water mud are logical
Road；8 and 9 nozzles；10, ring flange.
Specific embodiment
Combined with specific embodiments below and attached drawing is described in further details the present invention.
Referring to flow chart 1, the construction method of double high-pressure stirring-spraying piles prepares before constructing: live three supplies and one leveling, i.e. access are led to
Water is powered on, and construction site is smooth.
Step 1: surveying and locating determines construction area full-page proof according to the figure that lays out pile, and carries out stake position by design pilespacing in every region
Setting-out, as shown in Figure 1, the control of the center spacing of stake and stake is in 0.3-0.5d (diameter that d is stake) range；
Step 2: long spire stake machine moves to pile driving position and is adjusted pile body, fixed pile；
Long spire stake machine uses the drill bit of following structures: as shown in Fig. 2, including bit matrix 1, the basic cross section of drill bit
For circle, a pair of rectangular blade 2 of setting and a pair of rectangular lower blade 3, the length of blade 2 on bit matrix 1
Greater than the length of lower blade 3, the antisymmetric tooth head 4 in left and right and tooth head 5, i.e. tooth head 4 and 5 central symmetry of tooth head is arranged in blade 2,
Symmetric points are fallen on the crosspoint of blade 2 and bit matrix 1；The antisymmetric tooth head 4 in left and right and tooth head are also provided on lower blade 3
5, symmetric points are fallen on the crosspoint of lower blade 3 and bit matrix 1.The end setting alloy of bit matrix 1 bores tooth 6, drill bit base
Double high pressure water slurry channels 7 are arranged in the inside of body 1, and bottom setting and the double high pressure water slurry channels of blade 2 and lower blade 3 pass through
Logical nozzle 8 and 9；Ring flange 10 is arranged in the upper end of bit matrix 1, connect with drilling rod.
Step 3: preparing cement slurry, cement slurry is prepared by the match ratio of design in first pulp storage tank, by what is prepared
Cement slurry is used when flowing into standby high-pressure injection pump mud jacking in second pulp storage tank from first pulp storage tank；
Step 4: the output end of high-pressure grout injector and the output end of air compressor pass through high pressure steel wire spiral rubber hose respectively
It is connected to double high pressure water slurry channels in bit matrix；Start long spire stake machine, high-pressure grout injector and air compressor, high pressure
The cement slurry of slip casting machine compression and the air of air compressor compression form high pressure water mud simultaneously in double high pressure water slurry channels
It is sprayed from nozzle, drill bit is rotated clockwise with constant rotational speed, is sprayed high pressure water mud in rotation, is made the soil body in situ
It is agitated；
Step 5: when long spire stake machine drill to predetermined position, stop drilling machine operation, while drill bit is lifted, counterclockwise
Direction rotates, and sprays high pressure water mud in rotation；The construction of double high-pressure stirring-spraying piles is completed on drill bit lift-off ground；
Step 6: drilling machine displacement repeats step 2 to step 5, completes all piles position into next pile stake position
Construction.
Concrete engineering example: metro station uses cut and cover tunneling, and the incorporation engineering geologic aspects station underground water is rich
Rich and stratum earthing is mostly miscellaneous fill, artificial earth fill.Double high-pressure stirring-spraying piles are constructed in such a way that jump is beaten between stake and stake, stake
Overlap distance with stake is 25cm, and driving depth 9.8m, stake diameter is 1m, tests Compressive Strength of Soil-cement Mixture after pile 28d.Scene
Coring 3, unconfined compression strength test result is S1 1.65MPa, 2.68MPa, 1.62MPa, and S1 average value is
1.98MPa；S2 are 2.74MPa, 2.79MPa, 2.59MPa, and S2 average value is 2.71MPa；S3 for 2.27MPa,
2.03MPa, 2.11MPa, S3 average value are 2.14MPa；Ordinary cement mixing pile pile body unconfined compressive strength is in 0.5-
Between 1.2MPa.
Double high-pressure stirring-spraying pile engineering methods of the invention fundamentally solve rotary churning pile and are remaining hard stratum, residual weathered stratum
Can not construction problem, to form vertical water-stop curtain by being mutually twisted between stake, station pit is anti-to blend sealing and ground excavating
It is applied successfully in reinforcing.
The above content is specific engineering construction example is combined, further detailed description of the invention, in practice not
It can assert that specific implementation of the invention is only limited to these instructions.The construction technical staff of the technical field of the invention is come
It says, without departing from the inventive concept of the premise, several simple deductions appropriate can also be made and replacement, above structure are all answered
It is considered as belonging to protection scope of the present invention.
Claims (2)
1. a kind of construction method of double high-pressure stirring-spraying pile water-stop curtains, which comprises the following steps:
Step 1: the center spacing of surveying and locating, stake and stake controls within the scope of 0.3-0.5d, d is the diameter of stake；
Step 2: long spire stake machine moves to pile driving position and is adjusted pile body, fixed pile；Long spire stake machine uses following structures
Drill bit: a pair of rectangular blade and a pair of rectangular lower blade, upper leaf are set including bit matrix, on bit matrix
The length of piece is greater than the length of lower blade, and blade and inferior lobe on piece are respectively provided with the antisymmetric tooth head in left and right；The end of bit matrix
Tooth, the double high pressure water slurry channels of inside setting of bit matrix, bottom setting and the double height of blade and lower blade are bored in end setting
The nozzle of compressed water slurry channel perforation；
Step 3: preparing cement slurry, uses when for high-pressure grout injector mud jacking；
Step 4: double high pressure water mud in the output end of high-pressure grout injector and the output end and bit matrix of air compressor are logical
Road connection；Start long spire stake machine, high-pressure grout injector and air compressor, the cement slurry of high-pressure grout injector compression and air compression
The air of machine compression forms high pressure water mud in drill bit, and drill bit is rotated in the forward direction with constant rotational speed, sprays high pressure water in rotation
Mud makes the soil body be agitated in situ；
Step 5: when long spire stake machine drill to predetermined position, stop drilling machine operation, while drill bit is lifted, reversely rotate, side
It rotates side and sprays high pressure water mud；The construction of double high-pressure stirring-spraying piles is completed on drill bit lift-off ground；
Step 6: drilling machine displacement repeats step 2 to step 5, completes the construction of all piles position into next pile stake position.
2. construction method according to claim 1, which is characterized in that the length of upper leaf piece is (diameter-matrix of stake
Diameter)/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810617872.0A CN109024554A (en) | 2018-06-15 | 2018-06-15 | Construction method of double-high-pressure mixing-spraying pile waterproof curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810617872.0A CN109024554A (en) | 2018-06-15 | 2018-06-15 | Construction method of double-high-pressure mixing-spraying pile waterproof curtain |
Publications (1)
| Publication Number | Publication Date |
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| CN109024554A true CN109024554A (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810617872.0A Pending CN109024554A (en) | 2018-06-15 | 2018-06-15 | Construction method of double-high-pressure mixing-spraying pile waterproof curtain |
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| CN (1) | CN109024554A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577865A (en) * | 2018-12-28 | 2019-04-05 | 青岛理工大学 | Double-high-pressure mixing and spraying pile drill bit and using method thereof |
| CN109723057A (en) * | 2018-12-29 | 2019-05-07 | 青岛理工大学 | Soil body reinforcing method for double-high-pressure stirring and spraying construction |
| CN109882073A (en) * | 2019-03-21 | 2019-06-14 | 青岛理工大学 | Variable-diameter double-high-pressure mixing and spraying pile and diameter changing method thereof |
| CN110331698A (en) * | 2019-06-11 | 2019-10-15 | 徐州工程学院 | A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577865A (en) * | 2018-12-28 | 2019-04-05 | 青岛理工大学 | Double-high-pressure mixing and spraying pile drill bit and using method thereof |
| CN109723057A (en) * | 2018-12-29 | 2019-05-07 | 青岛理工大学 | Soil body reinforcing method for double-high-pressure stirring and spraying construction |
| CN109882073A (en) * | 2019-03-21 | 2019-06-14 | 青岛理工大学 | Variable-diameter double-high-pressure mixing and spraying pile and diameter changing method thereof |
| CN110331698A (en) * | 2019-06-11 | 2019-10-15 | 徐州工程学院 | A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |